The use of probiotics as a nutritional solution to dog anxiety continues to be explored. But the results of scientific studies that have already been conducted show that specific bacterial strains, such as Bifidobacterium longum, have a positive effect in addressing anxiety and stress issues in dogs.  Suffice to say, good quality probiotics for dogs should  be considered as part of a management plan to alleviate anxiety in dogs as well as improve their health and well-being.